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| Patents for L. S. Logan | |||||
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| Number | Date | Patentee | Title | Type | |
| 370,731 | Sep. 27, 1887 | G.B. Durkee | Apparatus for forming violin-case covers | wood bending machines | |
| 370,732 | Sep. 27, 1887 | G.B. Durkee | Manufacture of mandolins | music instrument maker | |